Portable loudspeaker system



FIG. 1 is a front elevational view of a portable speaker showing my newdesign;

FIG. 2 is a right side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a bottom plan view;

FIG. 5 is a left side elevational view; and

FIG. 6 is a top plan view.

The ornamental design for a portable speaker, as shown.